GURPSよろず

　「特殊効果」s don’t have to do bad things to living targets. These rules address two common exceptions.

Beneficial Afflictions
If an 「特殊効果」’s effects are so unquestionably positive that no one would ever object to them, the GM may reverse the sign of the HT modifier; e.g., 「特殊効果」 3 gives a HT+2 roll instead of a HT-2 roll. Duration becomes minutes equal to the subject’s margin of success, not his margin of failure.
If such an 「特殊効果」 has 「呪文状」, the subject can waive his right to resist. The ability works if the user can make an unopposed 意志力判定(at the usual range penalties). In this case, duration in minutes equals the user’s margin of success.

Afflictions and Inanimate Targets
An 「特殊効果」 can affect anything with a HT score . . . if the target is susceptible to its effects. Most inanimate objects --including all machines --have Immunity to Metabolic Hazards. This stops most 「特殊効果」s, with two exceptions.

「特殊効果」s restricted to inanimate targets via 「条件限定」 modifiers (such as “Only on Electrical”) affect those objects instead of living beings. This is only acceptable in conjunction with effects that make sense for the intended targets. You could render a machine “unconscious” by cutting its power, but you couldn’t inflict nausea.

「特殊効果」s that cause 「透明」, 「縮小」, and other transformations through the Advantage modifier affect everything.
To prevent those with low levels from zapping planets, the GM should let unliving, homogenous, and diffuse targets add their SM to their resistance roll (an Earth-sized planet is SM +43).
If modified HT comes to 21+ after applying SM and the 「特殊効果」’s HT modifier, resistance is automatic --nothing happens.